Improvement in lamp-globes



UNITED STATES PATEN Fil-ll.

HENRY H. HULBURT, OF PHILADELPHA, PENNSYLVANIA.

IMPROVEMENT IN LAMP-mises.

Spccication forming part of Letters Patent No. 2111,018, dated December 17, 1878; application filed November 12, 1878. l

.To all whom it 'may concern.

Be it known that l, HENRY H. HULBURT, of lhiladelphia,in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Combined Lamp Globe, Chimney, and Reflector; and l do hereby declare the following to be a full, clear, and eXactdescription of the invention, such as will enable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form part of this specification, in which- Figure 1 is a central vertical sectional view of my invention. Fig. 2 is a side view, and Fig. 3 is a detail view, of modification.

My invention has for its object to provide means for increasing the draft of metal-top globes used in lieu of chimneys on lamp-burnf ers, and at the same time to conceal the metal top, so as to produce an improved finish.

lMy invention consists of a globe having a chimney like extension, integral therewith above its upper opening', and a rabbet or ledge for the reception of a metal plate or reiiector located at the junction ofthe body of the globe and said extension. rl'he upper half ofthe globe and its extension are frosted or ground, so as to conceal the metal plate, while the lower half ofthe globe is smooth or plain, to permit the free passage of the light reflected downward by the metal plate.

My invention further consists in the combination, with the globe having the chimney-e5:- tension and rabbet, and frosted or roughened, as described, of a metal plate located within and concealed by said parts, as hereinafter fully described.

Referring` to the accompanying drawing, A indicates a lamp-burner, of any suitable construct-ion, with my improved device applied thereto. B is a globe, which may have the usual flaring globe-llange b, as shown in Fic. l, or may have a straight up-and-down annular flange, ZJ', as shown in 3, to lit it on the lamp-burner. B represent-s the top opening or mouth of the globe, and G a chimney-like extension proceeding upwardly therefrom. At or about the junction of the globe-body B and the chimneyeiztension C is formed a rabbet, ledge, or groove, d, for the reception of a and steadies the light.

metal plate, D. The oflice of this plate isthat of metal tops for globes now in use-namely, to contract the opening of the globe, so as to cause the draft to pass through the diminished opening d', and also to reflect the light from the flame downwardly.

The chimney-extension C increases the draft through the opening d, and thereby improves The upper half of the globe-body B and the chimney-extension C are roughcned or frosted in any suitable manner, whereby the metal plate, when fitted on the rabbet d, is concealed from view. Said plate can thereby perform its useful functions with out im pairing the ornamental appearance ofthe globe, or the finish and symmetry obtained by the employmentof the chimney-extension C.

I am aware that chimneys having an enlargement or bulb are not new, and that a globe with a metal top as a substitute for a lamp-chimney is now in use. I do not wish, therefore, to be understood as claiming either of these; but

What I do claim is- 1. A globe, B, having a chimney-extension, C, and a ledge, d, for the reception of ametal plate, D, said chimneyextension being larger' in diameter than the internal diameter ofthe ledge, so as to admit said plate, substantially as shown and described.

2. In combination with a globe, B, having an extension, C, and ledge or support d, a metal plate, D, located therein, substantially as shown and described.

3. i ln combination with the metal plate or reflector D, a globe, B, having a chimney-like extension, C, the upper half of said globe and the extension being roughened or frosted, to conceal said plate, and the lower half of said globe smooth or plain, to permit the passage of the light reiiected downward by the plate D, as set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 24th day of October, 1878.

HENRY H. HULBURT.

Witnesses:

Gino. C. SHELMERDINE, M. D. GONNOLLY. 

